Mitsubishi Electric Melsensor CF37-SR Settings Manual page 51

How many codes do you need to read for each trigger?
The number of codes to be read is specified (1 is set as a default). It can be set if a captured image contains multiple codes.
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 Set the number of codes to be read in "Number of Codes."
 When "No" is selected for "Should partial result be reported as a good-read?" and when the code reader is set to read
multiple codes, the read result is not returned until the same number of codes are read as the set number of codes. (For
example, when 2 is set for the number of codes, the result is not returned until two codes are read.) To make the read result
return even if only one code is read, select "Yes" for "Should partial result be reported as a good-read?."
 Set values for "Maximum number of codes per symbology you need to find." In the example, the setting is configured to
read two Data Matrix codes in an image.
8 Application Steps
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8.2 Code Details